anyways i forund out why that ewrror occured and thats because i have aku2 rom , and i need the button rom to fix it the unlock
source:http://forum.xda-developers.com/showthread.php?t=263116
if yoy see an eroot while unlocking that says;
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CopyFileToTFFS(cidunlocked.bin:0, 0, 00010000)
ERROR: ITWriteDisk - An internal error occurred.
this means that you device not been unloked......try again............
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That’s it your wizard is unlocked. Make sure yew keep the [lock_backup.bin] in a safe place you may need it for guaranty purposes.
Now flash the latest aku2 rom from your provider.- [very important,to avoid future problems wit rom updates]
then u can flash any rom you want.
havent tested it yet but ill let u know when i do